Mongoose Schema hasn't been registered for model

Question

I\'m learning the mean stack and when I try to start the server using

npm start

I get an exception saying that:

schema has         


        

Answer 1

This error also pops up when we create wrong references (ref) between mongoose models.

In my case I was referring to the file name instead of model name.

eg:

const userModel = mongoose.model("user", userSchema);

We should refer to 'user' (model name) instead of 'User' (file name);